NASHVILLE, Tenn. — Over the past six months, a series of undercover videos focused on Planned Parenthood made national headlines, provoked outrage in Congress, and prompted investigations in about a dozen states.

Still, the reaction of most Americans is, “What videos?”

The videos show activists from the Center for Medical Progress (CMP) and Planned Parenthood officials discussing and negotiating possible payments for donated fetal remains. Leaders of the CMP say the videos show Planned Parenthood illegally selling fetal remains. Planned Parenthood denies that claim.

A phone survey of 1,000 Americans from Nashville-based LifeWay Research found 7 out of 10 are either not aware of the videos (43 percent) or have not spoken out after seeing them (27 percent). Among those who are aware of the videos, relatively few spoke out against Planned Parenthood.

“Given the serious accusations against Planned Parenthood — that they sold baby parts — it is surprising how few Americans responded,” said Ed Stetzer, executive director of LifeWay Research.

The survey was completed in September, at a time the videos received renewed attention during a debate among Republican presidential candidates.